Monolithically integrated, polarity-reversal protected circuit

Details Monolithically integrated, polarity-reversal protected circuit Monolithically integrated, polarity-reversal protected circuit

1985-11-04

1987-08-25

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 56, 361 86, 307127, 330207P, 330298, H02H 320

Patent

active

046897119

ABSTRACT:
A monolithically integrated, polarity-reversal protected switching circuit includes, in the output of a switching stage, a symmetrical thyristor instead of an otherwise customary diode. This thyristor is constituted by an npn transistor and a lateral pnp transistor. The control input of the thyristor is controlled by an additional control arrangement in such a manner that the thyristor is switched off at the occurrence of high voltage peaks. In this manner, there is obtained a relatively inexpensive monolithically integrated switching arrangement which is protected against polarity reversal and withstands voltage pulses of up to 150 volts.

REFERENCES:
patent: 3748569 (1973-07-01), Frank et al.
patent: 4194134 (1980-03-01), Bjorklund et al.
patent: 4400711 (1983-08-01), Avery
patent: 4499673 (1985-02-01), Garrett et al.
patent: 4567580 (1986-01-01), Avery
patent: 4581542 (1986-04-01), Steigerwald
patent: 4581543 (1986-04-01), Herberg
patent: 4595941 (1986-06-01), Avery

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